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<H1>sane-canon630u</H1>
Section: SANE Scanner Access Now Easy (5)<BR>Updated: 11 Jul 2008<BR><A HREF="#index">Index</A>
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
<A NAME="ixAAB"></A>
<A NAME="lbAB">&nbsp;</A>
<H2>NAME</H2>
sane-canon630u - SANE backend for the Canon 630u USB flatbed scanner
<A NAME="lbAC">&nbsp;</A>
<H2>DESCRIPTION</H2>
The
<B>sane-canon630u</B>
library implements a SANE (Scanner Access Now Easy) backend that
provides access to the following Canon flatbed scanners:
<P>
<DL COMPACT><DT id="1"><DD>
CanoScan 630u
<BR>
CanoScan 636u
<BR>
</DL>
<P>
Color scanning is supported at 75, 150, 300, and 600 dpi, and gamma and
analog gain are adjustable.
<P>
TESTERS ARE WELCOME. Send your bug reports and comments to
Nathan Rutman &lt;<A HREF="mailto:nthn1@yahoo.com">nthn1@yahoo.com</A>&gt;
<P>
<A NAME="lbAD">&nbsp;</A>
<H2>CONFIGURATION</H2>
The contents of the
<I>canon630u.conf</I>
file is a list of device names that correspond to Canon
USB scanners. Empty lines and lines starting with a hash mark (#) are
ignored. Only one device name can be listed in
<I>canon630u.conf</I>.
The program
<I>sane-find-scanner</I>
helps to find out the correct device. Under Linux, such a device name
could be
<I>/dev/usb/scanner0</I>
for example. See <A HREF="/cgi-bin/man/man2html?5+sane-usb">sane-usb</A>(5) for details.
<P>
This product-specific scanner driver uses the lower-level kernel USB driver
&quot;scanner&quot;. Check for &quot;Driver=usbscanner&quot; under /proc/bus/usb/devices. If
&quot;Driver=(none)&quot;, try forcing it with &quot;insmod scanner vendor=0x04a9 product=0x2204&quot;
<A NAME="lbAE">&nbsp;</A>
<H2>NOTES</H2>
<P>
Due to Canon's unwillingness to provide scanner documentation, this
software was developed by analyzing the USB traffic of the Windows
2000 driver. So things like the calibration procedure I kind of made up;
it seems to work for my scanner. If you have complaints, let me know.
<P>
This driver requires the ability to send USB Control Messages, available in
kernel 2.4.12 or later.
<P>
Some users have reported that this driver doesn't work at all. This seems
to be a hardware specific issue, although I don't know what exactly the
problem is. If you are having problems, please send me the info in
/proc/bus/usb/devices, /proc/pci, the kernel scanner.c driver version from
/var/log/messages, and the output from &quot;SANE_DEBUG_CANON630U=12 scanimage &gt; /dev/null&quot;
<P>
<A NAME="lbAF">&nbsp;</A>
<H2>FILES</H2>
<DL COMPACT>
<DT id="2"><I>@CONFIGDIR@/canon630u.conf</I>
<DD>
The backend configuration file (see also description of
<B>SANE_CONFIG_DIR</B>
below).
<DT id="3"><I>@LIBDIR@/libsane-canon630u.a</I>
<DD>
The static library implementing this backend.
<DT id="4"><I>@LIBDIR@/libsane-canon630u.so</I>
<DD>
The shared library implementing this backend (present on systems that
support dynamic loading).
<DT id="5"><I>/tmp/canon.cal</I>
<DD>
The calibration file used to normalize pixel brightness. This is
calculated every time the scanner is first used after it has lost power.
Deleting this file will force recalibration.
</DL>
<A NAME="lbAG">&nbsp;</A>
<H2>ENVIRONMENT</H2>
<DL COMPACT>
<DT id="6"><B>SANE_CONFIG_DIR</B>
<DD>
This environment variable specifies the list of directories that may
contain the configuration file. Under UNIX, the directories are
separated by a colon (`:'), under OS/2, they are separated by a
semi-colon (`;'). If this variable is not set, the configuration file
is searched in two default directories: first, the current working
directory (&quot;.&quot;) and then in @CONFIGDIR@. If the value of the
environment variable ends with the directory separator character, then
the default directories are searched after the explicitly specified
directories. For example, setting
<B>SANE_CONFIG_DIR</B>
to &quot;/tmp/config:&quot; would result in directories &quot;tmp/config&quot;, &quot;.&quot;, and
&quot;@CONFIGDIR@&quot; being searched (in this order).
<DT id="7"><B>SANE_DEBUG_CANON630U</B>
<DD>
If the library was compiled with debug support enabled, this
environment variable controls the debug level for this backend. Higher
debug levels increase the verbosity of the output.
<P>
Example:
<BR>
SANE_DEBUG_CANON630U=12 scanimage &gt; /dev/null
</DL>
<A NAME="lbAH">&nbsp;</A>
<H2>SEE ALSO</H2>
<A HREF="/cgi-bin/man/man2html?7+sane">sane</A>(7), <A HREF="/cgi-bin/man/man2html?5+sane-usb">sane-usb</A>(5), <A HREF="/cgi-bin/man/man2html?1+sane-find-scanner">sane-find-scanner</A>(1)
<BR>
<A HREF="http://canon-fb630u.sourceforge.net/">http://canon-fb630u.sourceforge.net/</A>
<BR>
<A NAME="lbAI">&nbsp;</A>
<H2>AUTHOR</H2>
Nathan Rutman
<P>
<HR>
<A NAME="index">&nbsp;</A><H2>Index</H2>
<DL>
<DT id="8"><A HREF="#lbAB">NAME</A><DD>
<DT id="9"><A HREF="#lbAC">DESCRIPTION</A><DD>
<DT id="10"><A HREF="#lbAD">CONFIGURATION</A><DD>
<DT id="11"><A HREF="#lbAE">NOTES</A><DD>
<DT id="12"><A HREF="#lbAF">FILES</A><DD>
<DT id="13"><A HREF="#lbAG">ENVIRONMENT</A><DD>
<DT id="14"><A HREF="#lbAH">SEE ALSO</A><DD>
<DT id="15"><A HREF="#lbAI">AUTHOR</A><DD>
</DL>
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